Ellen Prentiss's papa said she was born with saltwater in her veins, so he gave her sailing lessons and taught her how to navigate. As soon as she met a man who loved sailing like she did, she married him. When her husband was given command of a clipper ship custom-made to travel quickly, she knew that they would need every bit of its speed for their maiden voyage: out of New York City, down around the tip of Cape Horn, and into San Francisco,...